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Voltage Level Indicator Circuit Design using LM339 for 9 Volts Battery Charger Voltage

An interactive LED, diode, Op-Amp and resistor circuit built in the DCACLab online simulator by supot sookpotharom.

Preview of Voltage Level Indicator Circuit Design using LM339 for 9 Volts Battery Charger Voltage
Open in the lab Embed The simulation runs as a demo that pauses after two minutes; open it in the lab to keep going.

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What's inside

  • 1× Battery
  • 2× Resistor (999 Ω, 998 Ω)
  • 1× LED
  • 1× Diode
  • 1× Switch
  • 1× Op-Amp
  • 1× Potentiometer
  • 1× Buzzer
  • Measured with Multimeter

Tags

Op-Amp Buzzer Diode Switch Battery Resistor LED Potentiometer Multimeter

About

By supot sookpotharom
Saved October 08, 2026
570 views
Page: dcaclab.com/circuits/87814-voltage-level-indicator-circuit-design-using-lm339-for-9-volts-battery-charger-voltage

Embed this circuit

<iframe src="https://dcaclab.com/experiments/87814-voltage-level-indicator-circuit-design-using-lm339-for-9-volts-battery-charger-voltage/iframe" width="560" height="410" frameborder="0"></iframe>

Cite: sookpotharom, s. (2026). Voltage Level Indicator Circuit Design using LM339 for 9 Volts Battery Charger Voltage. DCACLab. https://dcaclab.com/circuits/87814-voltage-level-indicator-circuit-design-using-lm339-for-9-volts-battery-charger-voltage

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